1 35 website (https://minetoh2project.uniovi.es/) with a consultation area, annual newsletters, and a promotional video. The communication plan proposes a multi-channel approach that combines a web presence, professional networks, social media, and targeted events to reach authorities, industry, civil society, and international platforms. 5. PRELIMINARY FINANCIAL ANALYSIS A preliminary economic assessment of the green hydrogen plant, without considering the blending operation and PV installation, was developed to assess the project's likely feasibility. According to the detailed budget presented in the proposal, the capital expense (CAPEX) required, including demonstration operating costs, is shown in Table 1, excluding value-added tax (VAT). Table 1 – MINE-TO-H2 project CAPEX Description Estimated cost (EUR) 2.24 MWp Photovoltaic plant 2,020,000 Electrolyser system 3,200,000 Mine water feeding and treatment systems 220,000 Hydrogen storage and refuelling systems 4,323,220 Electrical system connection 324,000 Mechanical & electrical balance of plants 1,870,000 Digital Twin and Artificial Intelligence software 110,000 Rental of equipment 187,850 Personnel costs 400,000 TOTAL CAPEX 12,655,070 The technical and economic parameters required for cash flow calculation are presented in Table 2. Financial outcomes will be calculated over 20 years, with depreciation periods also of 20 years for the green hydrogen plant and the photovoltaic installation. Table 2 – Technical and economic parameters for cash flow calculations Description Value Functioning hours of the installation for one 6,000 h
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